Improvement in mwrble-pallshingivltvghines



K. J. ENSMINGER.

MARBLE POLISHING MACHINE,

' Paten-ted- Aug. 8, 1876.

775:0. 7?/ I J E a N-PETERS. PHOTO-LIYHOGRAPHER, WASHINGTON, D. C

KQSSUTH; Jzpnnsn nenn, on PORTLAND, JINDIANAIHASSIGNQR. ononnznntn His-:nrenr- T0 JOHN awmr-nns, onsAMnrnAcE;

IMPRZQVEM EN m MA R BL'E-RQLlSH m r M A HI MES...

SpecificationformingpartiofiLetters Patent No. 180,707, .(lated Au gustI8,}187( i; application filed f June 2,1876. I v v rubber or polisherxsothatit shalllhave a continuously-varying movement, combining the longitudinal lateral, and-* rotary movements, the horizontal and rotary'movements being given from an adjustable sliding head, and the lateral from a traversingmara carried by threaded shafts operated bysuitablamechanism.

Figure l is a top view of the polishing-machine. Fig. 2 is a side elevation of the same, having portions cut away to more clearly illustrate the interior. Fig. 3 is a cross-section of the machine immediately in front of shaft J. A represents the frame, which should be continuous to the right-hand end, and embrace the entire parts of the machine- As the frame was constructed in two parts, the same are attached to a common base, B. The shaft M has bearings near'tl e left-hand end of the frame. Slide-bars are. bolted onto the frame, which, with the topofthe frame, form grooves for the sliding head L. At the left-hand or front end of frame, and atcenter cross-bar, is

supported the adjusting-rod D. This rod moves wit-hinthe threaded nut R, which is.

connected to the sliding head, and by turning the same the sliding head is moved backward and forward. P is a swivel-joint near the right-hand end of the rod, and the bar T connects this joint to the wheel 0. (See Fig. 2.) The shaft M has upon it, external to the frame, a pinion, S, and within the frame a band-wheel, E, and without the frame, on the opposite side to wheel S, a pulley for the bands 8 and t.

pivotal frame, circular in form, with recesses for thegrooved-pulley on thenearzorvleftahand side; and 1a :mitenwh eel ion-thefarthen or; ri glitihand side, which gears into its-fellow, support ed by. a. vertical shaft; secnrediito .thecenteraof;

the pivotaliframer. Overzthe :miterwheel lS'; at

grooved pulley, which-.pulley; is con nected by.

the handu totheepulleyi onthecshaft' Z. The: connectingtarm c is attached-rte theaverticall shaft-1. of the; pivotal. frame,-:.and1onfwhicli.itt.

freely oscillates... Omtheoppositeien otthise the case. This case is pivoted to the arms of the slide G, which is notched, and moves freely over the traversing rod H. The rubbers are made of cast'iron, wood, or other suitable material, circular in form, and notched on the upper inner side to receive the projections on the shaft ,Z 5 and by this means the rubber is made to rotate within the case. At the top of the shaft is a funnel'to convey the sand or other material to the surface of.the marble block F. This has a'support within the frame. The weight of the shaft alone rests upon the rubber; and to add to the pressure a spring may be used (see Fig. 2) to add the weight of the arm and case tof,the rubber.

Other means than that of a spring may be used to furnish weight to'the rubber.

The device for reversing the lateral motion is represented at Fig. 3, the two pulleys m n having notched faces to engage the sliding clutch 0, which has a feather moving within a groove of the shaft J, by which it is rotated when engaged by either of the loose pulleys. These pulleys are turned in opposite direc' .tions'by the bands from themain shaft. The

pulley n has a band running onto the pulley on the shaft K. This connection causes the which the pins 1 and 2 are inserted. These pins are so situated that the head or downward projection of the traverse-rod H engages them, and thereby carrying the pivotal arm 4, which carries with it the clutch. That the movement may be perfect, a rod, 5, its upper end terminating in an obtuse angle, and being supported from beneath by a spiral spring, bears against the lower end of this lever, and when the said lever is carried by the point the reaction of the spring throws the clutch so as to engage the opposite pulley, and thus is the act-ion reversed, causing the rubber to be moved first in one direction and then in the opposite. To regulate the lateral movement, the pins are changed as required.

V is a balance-wheel to prevent the-device from stopping on the center at the point of change.

A crank is attached to the main shaft, and, when drivenby power, a pulley will take the place of the crank. The motion is from the main shaft to the vibrating shaft beneath, from this to the shaft of the pivotal frame, and from this to the rubber resting on the block of marble. The appliances effecting these several movements produce the rotary and longitudinal movements of the rubber on the marble slab. The rod D forms the connection between the sliding frame and'the reciprocating arm, and by turning the same the rubber is carried to any point on the slab desirable.

In regard to the operation, after what has been presented, it is only necessary to add that the usual material known to expertssand, grits, pumice, &c.-is passed into suitable rubbers attached to "the shaft, through the orifice within the same. .The support to the rubber-case is such that the marble may-- be polished at an angle deviating from a hori- H, the shafts J and K, the armed guide G,

rubber-case w, rod 3, clutch 0, and pulleys m and n, substantially as set forth, to give an alternate lateral movement to the said rubber-case, for the use specified.

KOSSUTH J. ENSMINGER. Witnesisest P. H. GUNOKEL, B. PIOKERING. 

